Table Of Content

Plant Ecology An international journal Contents Volume 128, Nos. 1-2, January/February 1997 UV-B and Biosphere guest editors: J. Rozema, W.W.C. Gieskes, S.C. van der Geijn, C. Nolan and H. de Boois Preface I. UV-B and aquatic ecosystems Penetration and effects of solar UV-B on phytoplankton and macroalgae D.-P. Hader UV damage to plant life in a photobiologically dynamic environment: the case of marine phytoplankton W.W.C. Gieskes & A.G.J. Buma Effects of acute and chronic UV-B exposure on a green alga: a continuous culture study using a computer-controlled dynamic light regime A. Veen, M. Reuvers & P. Roncgak Role of ultraviolet-B radiation on bacterioplankton and the availability of dissolved organic matter G.J. Herndl, A. Brugger, S. Hager, E. Kaiser, I. Obernosterer, B. Reitner & D. Slezak Physiological and structural changes in the chloroplast of the green alga Micrasterias denticulata induced by UV-B simulation C. Liitz, H.K. Seidlitz & U. Meindl Il. UV-B and terrestrial ecosystems: general and methodological aspects Uses of biological spectral weighting functions and the need of scaling for the ozone reduction problem M.M. Caldwell & S.D. Flint Outdoor supplementation systems for studies of the effects of increased UV-B radiation A.R. McLeod In assessing biological UV-B effects, natural fluctuations of solar radiation should be taken into account R. Santas, A. Koussoulaki & D.-P. Hader Ill. UV-B and physiology of terrestrial plants Beneficial effects of enhanced UV-B radiation under field conditions: improvement of needle water relations and survival capacity of Pinus pinea L. seedlings during the dry Mediterranean summer Y. Manetas, Y. Petropoulou, K. Stamatakis, D. Nikolopoulos, E. Levizou, G. Psaras & G. Karabourniotis 100-108 Ultraviolet-B radiation effects on the Mediterranean ruderal Dittrichia viscosa M. Stephanou & Y. Manetas 109-112 Effects of solar UV-B radiation on growth, flowering and yield of central and southern European bush bean cultivars (Phaseolus vulgaris L.) M. Saile-Mark & M. Tevini 114-125 Morphological and physiological responses of bean plants to supplemental UV radiation in a Mediter- ranean climate F. Antonelli, D. Grifoni, F. Sabatini & G. Zipoli 127-136 The effect of enhanced ultraviolet-B radiation on germination and seedling development of plant species occurring in a dune grassland ecosystem M. Tosserams, E. Bolink & J. Rozema 138-147 Leaf thickness and UV-B absorbing pigments of plants in relation to an elevational gradient along the Blue Mountains, Jamaica J. Rozema, A. Chardonnens, M. Tosserams, R. Hafkenscheid & S. Bruijnzeel 150-159 Reaction of savanna plants from Botswana on UV-B radiation W.H.O. Ernst, J.W.M. van de Staaij & H.J.M. Nelissen 162-170 The impact of elevated UV-B (280-320 nm) radiation levels on the reproduction biology of a highland and a lowland population of Silene vulgaris J.W.M. van de Staaij, E. Bolink, J. Rozema & W.H.O. Ernst 172-179 IV. Interactions of UV-B with environmental factors Effects of UV-B radiation on terrestrial plants and ecosystems: interaction with CO, enrichment J. Rozema, G.M. Lenssen, J.W.M. van de Staaij, M. Tosserams, A.J. Visser & R.A. Broekman 182-191 Effects of increasing UV-B radiation and atmospheric CO? on photosynthesis and growth: implications for terrestrial ecosystems J.H. Sullivan 194-206 The combined effects of CO, concentration and enhanced UV-B radiation on faba bean 3. Leaf optical properties, pigments, stomatal index and epidermal cell density A.J. Visser, M. Tosserams, M.W. Groen, G. Kalis, R. Kwant, G.W.H. Magendans & J. Rozema 208-222 Effects of solar ultraviolet-B radiation, temperature and CO2 on growth and physiology of sunflower and maize seedlings U. Mark & M. Tevini 224-234 Combined effects of enhanced UV-B radiation and nitrogen deficiency on the growth, composition and photosynthesis of rye (Secale cereale) G. Deckmyn & I. Impens V. UV-B and terrestrial ecosystems Effects of enhanced UV-B radiation and elevated carbon dioxide concentrations on a sub-arctic forest heath ecosystem D. Gwynn-Jones, J.A. Lee & T.V. Callaghan 242-249 The effects of UV-B radiation on European heathland species L.O. Bjorn, T.V. Callaghan, I. Johnsen, J.A. Lee, Y. Manetas, N.D. Paul, M. Sonesson, A.R. Wellburn, D. Coop, H.S. Heide-Jargensen, C. Gehrke, D. Gwynn-Jones, U. Johanson, A. Kyparissis, E. Levizou, D. Nikolopoulos, Y. Petropoulou & M. Stephanou 252-264 Differential effects of elevated ultraviolet-B radiation on plant species of a dune grassland ecosystem M. Tosserams, E. Magendans & J. Rozema 266-281 Stratospheric ozone reduction and ecosystem processes: enhanced UV-B radiation affects chemical quality and decomposition of leaves of the dune grassland species Calamagrostis epigeios J. Rozema, M. Tosserams, H.J.M. Nelissen, L. van Heerwaarden, R.A. Broekman & N. Flierman 284-294 The role of interactions between trophic levels in determining the effects of UV-B on terrestrial ecosystems N.D. Paul, S. Rasanayagam, S.A. Moody, P.E. Hatcher & P.G. Ayres 296-308 Instructions to authors 309-312 List of contributors KB J Sten